/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/*
 * VaryNode.java
 * Copyright (C) 2002 Remco Bouckaert
 * 
 */

package weka.classifiers.bayes.net;

import java.io.Serializable;

/**
 * Part of ADTree implementation. See ADNode.java for more details.
 * @author Remco Bouckaert (rrb@xm.co.nz)
 * @version $Revision: 1.2 $
 */
public class VaryNode implements Serializable {
	/** index of the node varied **/
	public int m_iNode;
	
	/** most common value **/
	public int m_nMCV;

        /** list of ADNode children **/
	public ADNode [] m_ADNodes;

        /** Creates new VaryNode */
        public VaryNode(int iNode) {
                    m_iNode = iNode;
        }
         
          /** get counts for specific instantiation of a set of nodes
           * @param nCounts - array for storing counts
           * @param nNodes - array of node indexes 
           * @param nOffsets - offset for nodes in nNodes in nCounts
           * @param iNode - index into nNode indicating current node
           * @param iOffset - Offset into nCounts due to nodes below iNode
           * @param parent - parant ADNode of this VaryNode
           * @param bSubstract - indicate whether counts should be added or substracted
           */
          public void getCounts(
            int [] nCounts, 
            int [] nNodes, 
            int [] nOffsets, 
            int iNode, 
            int iOffset, 
            ADNode parent,
            boolean bSubstract) {
              int nCurrentNode = nNodes[iNode];
              for (int iValue = 0 ; iValue < m_ADNodes.length; iValue++) {
                if (iValue != m_nMCV) {
                  if (m_ADNodes[iValue] != null) {
                    m_ADNodes[iValue].getCounts(nCounts, 
                    	nNodes, 
                    	nOffsets, 
                    	iNode + 1, 
                    	iOffset + nOffsets[iNode] * iValue, 
                    	bSubstract);
                  }
                } else {
                  parent.getCounts(nCounts, 
                  	nNodes, 
                  	nOffsets, 
                  	iNode + 1, 
                  	iOffset + nOffsets[iNode] * iValue, 
                  	bSubstract);
                  for (int iValue2 = 0; iValue2 < m_ADNodes.length; iValue2++) {
                    if (iValue2 != m_nMCV && m_ADNodes[iValue2] != null) {
                        m_ADNodes[iValue2].getCounts(nCounts, 
                        	nNodes, 
                        	nOffsets, 
                        	iNode + 1, 
                        	iOffset + nOffsets[iNode] * iValue, 
                        	!bSubstract);
                    }
                  }
                }
              }
          } // getCounts

          /* print is used for debugging only, called from ADNode
           * @param sTab - amount of space.
           */
        public void print(String sTab) {
          for (int iValue = 0; iValue < m_ADNodes.length; iValue++) {
            System.out.print(sTab + iValue + ": ");
            if (m_ADNodes[iValue] == null) {
              if (iValue == m_nMCV) {
                System.out.println("MCV");
              } else {
                System.out.println("null");
              }
            } else {
              System.out.println();
              m_ADNodes[iValue].print();
            }
          }
        } // print

} // class VaryNode
